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| Presentation | 2020-02-28 13:10 Defect detection for shotcrete in ceiling of underground cavity by noncontact acoustic inspection method -- Alternative method of hammering inspection by acoustic irradiation induced vibration from a long distance -- Tsuneyoshi Sugimoto, Kazuko Sugimoto (Toin Univ.), Noriyuki Utagawa, Chitose Kuroda (SatoKogyo), Hiroshi Morioka, Shigeru Tsuruta (TEPCO), Takayuki Nakagawa, Ataru Honda (TEPSCO), Naoto Sugisaki, Takao Yamazaki (tousetu) |
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| PDF Download Link |  US2019-100 |
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